Filter apparatus



Aug- 4, 1931. A. JoRDAHL 1,816,855

FILTER APPARATUS Filed June 12, 1926 2 Sheets-Sheei 2 INVENTOR BYKM Patented Aug'. 4, 1931 sais PATENT OFFICE ANDERS JORDAHL, OF NEW YORK, N. Y., ASSIGNOR T0 AMERICAN AIR FILTER GOM.- EMFY, INC., OF LOUISVILLE, KENTUCKY, A CORPORATION 0F DELAWARE FILTER APPARATUS application med June 12,

This invention relates to filter apparatus, and more particularly to lan apparatus for 'filtering' air and gases of the character shown and described in my prior application for patent, Serial -No. 107,118, filed' May (i, 1926, wherein there is provided an endless movable chain of cells or holders for the filter medium intercepting the path of flow of the air or gas. j

it is the primary object and purpose of mypresent improvements to provide greater fiexibility in the articulated chain of filter cells together with an improved barrier means of great durability yieldable in the relative angular movement of adjacent filter cells and effectively preventing the passage of unfiltered air therebetween.

it is also an important object of the present invention to provide holding frames for the individual cells and means whereby the cells may be demountably secured in said frames so that the individual cells may be selectively removed from the articulated chain of cell frames for thorough cleaning when necessary. I may also provide a de- .tachable plate to be substituted for the removed filter cell to close the open side of said framex and prevent the passage of the unfilteredair therethrough so that the apparatus with the remaining filter cells may continue in operation, in case extra replacement filter cells are not available.

With the above and other objects in view, the invention consists in the improved filter apparatus, and in the form, construction and relative arrangement of its several parts as will be hereinafter more fully described, illustrated in the accompanying drawings, and subsequently incorporated in the subjoined claims.

In the drawings, wherein I have illustrated onesimple and satisfactory embodiment of the invention and in which similar reference characters designate corresponding parts throughout the several views,

Figure 1 is a fragmentary rear eleva tion showing two of the articulated frames with the filter cells mounted therein;

Fig. 2 is a side elevation thereof;

1926. Serial No. 115,501.

-novel features of thev present invention. A

complete installation isA shown and described in my prior patent`` application to which reference may be had. In this former construction the cells containing the filter' medium are directly connected or articu- 4lated with each other in the form of an endless travelling chain. In my improved construction however, I propose to demountably secure the individual filter cells in separate frames. These frames generally indicated at 5 may be stamped or otherwise formed from sheet metal of proper gauge, and as shown in Fig. 1 of the drawings are of horizontally elongated forni. The opposite side walls G of each frame are relatively wide in comparison with the upper and lower end `walls 7 which are comparatively narrow. At the front side of the frame through which the air enters, the vwalls 6 and 7 thereof are provided with the inturned flanges 9 connected at their ends by corner plates 10 welded or otherwise secured to said frame flanges.

To the outer faces of the side walls 6 of each frame the plates 11 are riveted as at 12, each of said plates preferably having a reduced or narrowed portion 18 extending longitudinally along one edge of the wall 6 while the other wider end portion 14 of said plates projects longitudinally beyond one end of the frame and overlaps upon the side wall 6 of an adjacent. frame. These plates 11 on the several cell frames are wholly positioned in a common plane, no bends being formed therein.

To the` side walls 6 of each frame and extending along the longitudinal edges thereof having the inturned flanges 9, thefrelatively wide link bars are securely'riveted or otherwise fixed, the ends of'said'lnk bars projecting beyond the opposite ends of the cell frame and one end of eachilinkk;

bar being angularly offset as at 16 to lap,

upon the corresponding link bar of an ad jacent cell frame.A These engaged ends of the link bars are apertured to receive the ends of the pivot rods 17 which carry suitable rollers for engagement by upper and lower sprocket wheels as revealed in my l which contain the filter medium may be fitted within the frames 5.

of any approved construction, and are of such dimensions that they may be readily 2O adapted 4to be engaged through open-- ings formed in the frame flanges 9 and the corner plates 10 thereof, said studs receiv` ling the clamping nuts 21` wherebyT the filter cells may be .rigidly fixed or secured inA the" respective frames. W'hatever theg'remaining structural details of the filter may be, the term filter cell as used inithl'S'devscription and in the claims ris tobe 'milder stood as meaning a box-like structure halving foraminous side walls between which a compact mass of filtering medium or inaterial is confined. u

The upper and lower end walls 7 of the cell receiving frames are provided at their ends with inturned-flanges indicated at 22 which are securely riveted to the side walls 6 of the frame and for the purpose of preventing the passage of unfiltered air between these cell receiving frames, I lprovide a thin sheet metal strip indicated at 23 having a plurality of bends or convolutions 24 formed therein and extending substantially throughout one dimension of the cell frames. The edges of this barrier strip of sheet metal are secured in the bent-over edges 25 of the frame walls 7. These bends of the frame walls provide reinforcements therefor and constitute spacers extending between the opposite side links 15 of the chain. By providing 'the series of bends or convolutions 24 in the sheet metal barrier strip which extend from the edgesof the wall 7 substantially to the pivot rods 17, the flexing or stretching of said plate is divided between said bends and as the relative angular movement of the link chains inpassing around the sprockets does not exceed 45, this stretching or elastic strain on the sheet metal barrier strip is These filter vThis material may reduced toa minimum, and is so slight that it will never exceed .the fatigue, limit of the metal stock. The pivot rods 17 .effectually prevent the disengagement or detachmentof the edges ofthe barrier plates 23 from the bent-over edges 25 of the frame walls 7.

From the foregoing description considered in connection with the accompanying drawings, the several improvements which l have made in the apparatusdisclosed in my pending application will be readily understood.

By demoun'tably arranging the individual cells in the separate frames, any one cell can be easily and quickly removed when the filtering material therein requires a thorough washing or cleansin by simply removing the nuts 21 and a c can replacement lter cell may be substituted therefor.` In the event that such replacement cells are not available, the open side of the frame 5 from which the cell has been removed may be closed by means of the plate 26 shown in Fig. `5 of the drawings which'is rovided at its corners with threaded studs 2 rThis plate may-be'enfraged against the inner sides of the Vframe anges 9 an'd the studs 27 positioned'V through .the openings therein to receive the clamping nuts 21. Thus, the articulated chain of cells may be continued in operation with the assurance that no unfiltered air will ass through the frame from which the cell as been removed. It is of course, understood that the side walls 6 of the frames and the plates 11 attached 'thereto travel in suitable guides on the housing or casing walls for the apparatus as shown in my giending application so that the. passage o unfiltered air around said cell receiving frames will be prevented. The flexible convolute barrier strips 23 b etween the cell frames will also preclude the passage of unfiltered air between the opposed ends of these frames. Therefore, it will be apparent that all air entering to lthe inner side of the filter cell chain must pass through the filterin material in the cells.

of any desired character such as fine metal strands coated with a suitable adhesive agent such as oil or viscosine whereby the finest dust particles contained in the air will be removed therefrom.

In the above description, I have referred t0 an embodiment of my present improvements which has given excellent results in practice. Nevertheless, it is apparent that the several novel features thereof might be incorporated in various other alternative structures, 'and I accordingly reserve the privilege of resorting to all such legitimate changes in the form, construction and relative arrangement of the several parts as may be fairly incorporated within the spirit and scope of the invention as claimed.

claim: l

1. In lter apparatus, a series of rectangular frames, means linking said frames together for relative angular movement, a filter medium containing cell for each frame, and means for demountably securing said cells in the respective frames with each marginal portion of the cell in supported contact Witha part of the frame.

2. In filter ap aratus, a series of frames, means linking sald frames together for relative angular movement, a filter medium containing cell for each frame, means for demountaply securing said cells in the respective trames, and a exible barrier means connecting the adjacent frames With each other to prevent the passage of air therebetween.

3. In lilter apparatus, a series of frames, means linking said frames together for relative angular movement, a filter medium'e'ontaining cell for each frame, means for demountably securinfr said cells in the respective `frames, and a convoluted flexible sheet metal barrier strip secured to the opposed walls of adjacent cell frames to prevent the passage of air therebetween.

4E. in filter apparatus, a series of frames, means linking the frames together for relative angular movement, plates secured to opposite sides of each frame extending longitudinally therefrom and lappingupon the -sides of an adjacent frame, flexible barrier means interposed between adjacent frames and extending longitudinally thereof between said plates to prevent the passage et air between the frames, a :filter medium containing cell for each frame, and means for demountably securing the cells in the respective frames.

5. ln lilter apparatus, aseries of fra-mes, means linking the frames together for relative angular movement, a convoluted strip of sheet metal arranged between adjacent frames and having its ed es secured to the opposed Walls thereof, a lter medium containing cell for each trame, and means 'for detachably mountin said' cells in the respective trames.

6. ln ilter apparatus, a series of frames, means linking the trames together for relative angular movement including pivot rods extending between the adjacent frames, a convoluted flexible metallic barrier strip arranged between the adjacent frames, the opposed 'Walls ci said frames having their 'edges bent over upon the edges oil said barrier strip and the spaced convolutions of said barrier .strip extending adjacent to the pivot rod, a lter medium containing cell for each frame, and means for detachably securing saidfcells in the respective trames.

7. ln lilter apparatus, a series of filter cell receiving frames, means for linking said frames together for relative angular movement, a flexible element connecting the adjacent frames to prevent the passage of air therebetween, a filter cell for each frame,

means for detachably mounting the filter detachably clamp the tilter cell in the trame.

9. lin iilter apparatus, a series ot frames, means linking the frames together for relative angular movement, connecting means 'between the adjacent frames to prevent the passage of air therebetween, a filter cell for each frame, means for detachably mounting the iilter cells in the respective trames, and a closure plate adapted to be substituted for the filter cell to prevent the passage of air through said frame when the iilter cell is removed. c

l0, in filter apparatus, a series oi" frames, means linking the :trames together for relative angular movement, connecting means between the adjacent frames to prevent the passage of air therebetween, a ilter cell Jfor each frame, means for detachably mounting the filter cells in the respective frames, said means including threaded studs carried by the lter cell, said 'frame having angcs provided with openings to receive said studs. nuts adapted to be threaded upon said, studs to detachably secure the llilter cell in `the frame, and a closure plate for the trame having threaded studs adapted to be engaged through said openings to receive said nuts when the cell is removed to thereby prevent the passage of air through the trame.

il. ln lter apparatus, lter cell carrying members, and resiliently yieldable means connecting adjacent members `with each other and permitting el their relative anguiar movement.

12. ln lter apparatus, a series elE lter cell carrying members, and a resilientlj/ yieldable metallic strip connecting the adj acent members with each other fer relative angular movement and constituting means preventing the passage ot unliltered air between sai members.

13. 'in lter apparatus, a series .of lter cell carrying ltrames for independently removably supporting a plurality of filter cells, means pivotally connecting said frames with each other, and a single resilient element arranged between and connecting 4 I i asienta the vadjacent frames to each other and per mittin of their relativevangulai` movement. 14. n filter apparatus, va series of frames adapted to receive and independentlysup- .5" ort filter medium containing cells, means inking said frames together for' relative angular movement, and a single yieldable element connecting the adjacent frames with each other ermitting of relative angular movement'tfereof and constituting a barrier preventing the passage ci unltered air between said frames.

l5. In filter apparatus, a series of cells each containing a filter medium and means for mounting said cells for relative movement, and means connecting adjacentl cells to prevent the passage of the substance to be filtered between same while permitting of their( relative movement. A 16. In Vfilter a paratus, spaced filter units, frictionally hel means extending across the I i s ace between units to prevent air passing t erethru, the removal of said means necessitating movement in one direction at least, and means normally interposed between said units to revent the removal of said i'rictionally` held means. '17. In filter apparatus, spaced filter units having (roove providing'lugs on their adjacent en means adapted to be slipped and frictionally held in said grooves, said vmeans extending across the space between said units so as to, prevent air passim therethru, and means normally posltione to prevent the removal of said air blocking means.

18. In ilter apparatus, spaced ilter units and resiliently yieldable means connecting adjacent units soY as to block the passage of air between-said units, said means being `40 frictionally held in place, and means for normally preventing the removal of said yieldable means. v

In testimony that I claim l)the foregoing as my invention, I have signed my namey hereto.

ANDERS.' JORDAHL. 

